Door mullion



FIG. 1 is a side view of a door mullion showing my new design;

FIG. 2 is a front view thereof;

FIG. 3 is a back view thereof;

FIG. 4 is an end view of the embodiment of FIG. 1;

FIG. 5 is an exploded view of the embodiment of FIG. 4;

FIG. 6 is a perspective view of the embodiment of FIG. 4;

FIG. 7 is an end view of another embodiment of the door jamb of FIG. 1:

FIG. 8 is an exploded view of the embodiment of FIG. 7; and,

FIG. 9 is a perspective view of the embodiment of FIG. 7.

The broken lines shown in the drawings depict depict portions of the door mullion that form no part of the claimed design. 

CLAIM The ornamental design for a door mullion, as shown and described. 